3D Surface Reconstruction

Bellocchio, Francesco; Borghese, N. Alberto; Ferrari, S.; Piuri, Vincenzo

doi:10.1007/978-1-4614-5632-2

Cited by 12 publications

(7 citation statements)

References 165 publications

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“…The method is robust, and the accuracy constraints are identical regardless of the scanned scene. Smooth homogeneous structures or repeated patterns are processed flawlessly (this being a substantial difference from the problematic procedure that characterizes, for example, methods based on stereophotogrammetric principles [19]), and the 3D model does not exhibit a cumulative deviation (unlike the products of, for example, handheld scanners [20] or other methods based on Iterative closest point (ICP) principle [21][22][23]). The manipulator moves the sensors along the body being scanned (Figure 4d), and the software processes, in real time, the distance data measured by the laser scanner into the form of a 3D surface model (Figure 4b).…”

Section: Methodsmentioning

confidence: 99%

The RoScan Thermal 3D Body Scanning System: Medical Applicability and Benefits for Unobtrusive Sensing and Objective Diagnosis

Chromý

Žalud

2020

Sensors

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The RoScan is a novel, high-accuracy multispectral surface scanning system producing colored 3D models that include a thermal layer. (1) Background: at present, medicine still exhibits a lack of objective diagnostic methods. As many diseases involve thermal changes, thermography may appear to be a convenient technique for the given purpose; however, there are three limiting problems: exact localization, resolution vs. range, and impossibility of quantification. (2) Methods: the basic principles and benefits of the system are described. The procedures rely on a robotic manipulator with multiple sensors to create a multispectral 3D model. Importantly, the structure is robust, scene-independent, and features quantifiable measurement uncertainty; thus, all of the above problems of medical thermography are resolved. (3) Results: the benefits were demonstrated by several pilot case studies: medicament efficacy assessment in dermatology, objective recovery progress assessment in traumatology, applied force quantification in forensic sciences, exact localization of the cause of pain in physiotherapy, objective assessment of atopic dermatitis, and soft tissue volumetric measurements. (4) Conclusion: the RoScan addresses medical quantification, which embodies a frequent problem in several medical sectors, and can deliver new, objective information to improve the quality of healthcare and to eliminate false diagnoses.

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Section: Methodsmentioning

confidence: 99%

The RoScan Thermal 3D Body Scanning System: Medical Applicability and Benefits for Unobtrusive Sensing and Objective Diagnosis

Chromý

Žalud

2020

Sensors

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“…The liquid-vapor interface reconstruction process infers the three-dimensional interface position from the obtained stereo image pairs obtained. For this purpose, it is necessary to identify pixels in the left and right views that correspond to the same point on the interface in the physical world, which is known as the correspondence problem [11]. Once the correspondences are determined, the geometric information about the camera system, which is known from the calibration process, is used to determine the threedimensional coordinates of the matched points among the views.…”

Section: Liquid-vapor Interface Reconstructionmentioning

confidence: 99%

“…An ideal measurement system to map the gaseous phase distribution and track the interface in a two-phase flow should be accurate, non-invasive, applicable to different flow configurations, easy to implement, and have high spatial and temporal resolution [11]. Multiple techniques have been developed with inherent tradeoffs among these traits, typically with an emphasis on characterizing dispersed bubbly flows.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional liquid-vapor interface reconstruction from high-speed stereo images during pool boiling

Mira-Hernández

Weibel

Vlachos

et al. 2019

International Journal of Heat and Mass Transfer

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A technique for reconstruction of liquid-gas interfaces based on high-speed stereo-imaging is applied to the liquid-vapor interfaces formed above a heated surface during pool boiling. Template matching is used for determining the correspondence of local features of the liquid-vapor interfaces between the two camera views. A sampling grid is overlaid on the reference image, and windows centered at each sampled pixel are compared with windows centered along the epipolar line in the target image to obtain a correlation signal. The three-dimensional coordinates of each matched pixel are determined via triangulation, which yields the physical world representation of the liquid-vapor interface. Liquid-vapor interface reconstruction is demonstrated during pool boiling for a range of heat fluxes. Textured mushroom-like vapor bubbles that are fed by multiple nucleation sites are formed close to the heated surface. Analysis of the temporal attributes of the interface distinguishes the transition with increasing heat flux from a mode in which vapor is released from the surface as a continuous plume to one dominated by the occurrence of intermittent vapor bursts. A characteristic morphology of the vapor mushroom formed during vapor burst events is identified. This liquid-vapor interface reconstruction technique is a time-resolved, flexible and non-invasive alternative to existing methods for phase-distribution mapping, and can be combined with other opticalbased diagnostic tools, such as tomographic particle image velocimetry. Vapor flow morphology characterization during pool boiling at high heat fluxes can be used to inform vapor removal strategies that delay the occurrence of critical heat flux during pool boiling.

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“…Many scanners use some method based on ICP [49], usually optimized [50] or modified for specific application [51]- [53]. This approach has two disadvantages: The absolute accuracy is very low, due to cumulative character of localizing algorithm, which sums partial errors [54].…”

Section: Sensor Localizationmentioning

confidence: 99%

Application of High-Resolution 3D Scanning in Medical Volumetry

Chromý¹

2016

International Journal of Electronics and Telecommunications

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Abstract-This paper deals with application of 3D scanning technology in medicine. Important properties of 3D scanners are discussed with emphasize on medical applications. Construction of medical 3D scanner according to these specifications is described and practical application of its use in medical volumetry is presented. Besides volumetry, such 3D scanner is usable for many other purposes, like monitoring of recovery process, ergonomic splint manufacturing or inflammation detection.3D scanning introduces novel volumetric method, which is compared with standard methods. The new method is more accurate compared to present ones. Principles of this method are discussed in paper and its accuracy is evaluated and experimentally verified.

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3D Surface Reconstruction

Cited by 12 publications

References 165 publications

The RoScan Thermal 3D Body Scanning System: Medical Applicability and Benefits for Unobtrusive Sensing and Objective Diagnosis

The RoScan Thermal 3D Body Scanning System: Medical Applicability and Benefits for Unobtrusive Sensing and Objective Diagnosis

Three-dimensional liquid-vapor interface reconstruction from high-speed stereo images during pool boiling

Application of High-Resolution 3D Scanning in Medical Volumetry

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